1. Department of PathologyOregon Health & Science UniversityPortlandOregon
2. Center for Molecular Biology and PathologyLaboratory Corporation of America HoldingsResearch Triangle ParkNorth Carolina
3. Seattle UltrasoundObstetrix Medical GroupSeattleWashington
4. Maternal Fetal MedicineSwedish Medical CenterSeattleWashington
5. Department of PathologyUniversity of Washington and Seattle Children's HospitalSeattleWashington